#216 Add getVolume helper method to PackedItemList

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 
-## [3.x - Unreleased] - 2020-xx-xx
+## [3.x - Unreleased] - 2021-xx-xx
+
+## [3.7.0] - 2021-01-01
+### Added
+- Added `getVolume` helper method to `PackedItemList`
 
 ## [3.6.2] - 2020-09-28
 ### Added
@@ -441,8 +445,9 @@ Initial release
  - Experimental code to get a feel for how calculations can best be implemented
  - Only works if all items fit into a single box (so not production ready at all)
 
-[3.x - Unreleased]: https://github.com/dvdoug/BoxPacker/compare/3.6.2...3.x
+[3.x - Unreleased]: https://github.com/dvdoug/BoxPacker/compare/3.7.0...3.x
 
+[3.7.0]: https://github.com/dvdoug/BoxPacker/compare/3.6.2...3.7.0
 [3.6.2]: https://github.com/dvdoug/BoxPacker/compare/3.6.1...3.6.2
 [3.6.1]: https://github.com/dvdoug/BoxPacker/compare/3.6.0...3.6.1
 [3.6.0]: https://github.com/dvdoug/BoxPacker/compare/3.5.2...3.6.0

src/PackedBox.php

@@ -179,14 +179,7 @@ public function getInnerVolume(): int
  */
  public function getUsedVolume(): int
  {
- $volume = 0;
-
- /** @var PackedItem $item */
- foreach ($this->items as $item) {
- $volume += $item->getVolume();
- }
-
- return $volume;
+ return $this->items->getVolume();
  }
 
  /**

src/PackedItemList.php

@@ -77,6 +77,20 @@ public function asItemArray(): array
  }, $this->list);
  }
 
+ /**
+ * Get total volume of these items.
+ */
+ public function getVolume(): int
+ {
+ $volume = 0;
+
+ foreach ($this->list as $item) {
+ $volume += $item->getVolume();
+ }
+
+ return $volume;
+ }
+
  private function compare(PackedItem $itemA, PackedItem $itemB): int
  {
  $itemAVolume = $itemA->getItem()->getWidth() * $itemA->getItem()->getLength() * $itemA->getItem()->getDepth();